27297191 has 2 divisors, whose sum is σ = 27297192. Its totient is φ = 27297190.

The previous prime is 27297133. The next prime is 27297199. The reversal of 27297191 is 19179272.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27297191 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27297199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13648595 + 13648596.

It is an arithmetic number, because the mean of its divisors is an integer number (13648596).

Almost surely, 2^27297191 is an apocalyptic number.

27297191 is a deficient number, since it is larger than the sum of its proper divisors (1).

27297191 is an equidigital number, since it uses as much as digits as its factorization.

27297191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876, while the sum is 38.

The square root of 27297191 is about 5224.6713772256. The cubic root of 27297191 is about 301.0966934007.

The spelling of 27297191 in words is "twenty-seven million, two hundred ninety-seven thousand, one hundred ninety-one".